Recent content by Dynamicus

scro I believe that an efficiency of 8% is not such a bad result. But it could probably be higher, maybe 10%. If I'm right, we'll see very soon, that is if I can model a propeller with 12% (or maybe 13%) efficiency. I'm already preparing for the modelling. It's taking me a little while because I...

zenonn That's a good idea, but... While I am able to model a propeller for the DJI Mini 2 that will have the same efficiency (or the same noise) as the Master Airscrew propeller, I don't have the time to look for the right propeller manufacturing technology using 3D printing (on home 3D...

I'm glad it helped you. I can talk about propellers all day if there's an audience. I bought the DJI Mini 2 just to test the upgraded propellers. I'm now thinking of a propeller shape that will allow for significantly longer battery life. I will then make a prototype propeller and measure the...

I'm afraid I don't know exactly what you mean. I'll try to explain it in another way: If you start the engines, they reach about 4000 rpm. If you then start to increase the speed of the motors, and each motor reaches about 9640 rpm, the drone will start to climb and go into hover. However, at...

I don't think it's possible to significantly accelerate a drone in level flight (for example in a tailwind). The maximum speed of the drone is probably limited by software. This has already been addressed somewhere on the forum. Increasing the speed would probably be possible with a DJI FPV...

Test conditions: voltage for ESC power supply is 8.8 V, altitude 230 m, air temperature 23 °C (Note: The efficiency measurement of each propeller affects the efficiency of the motor and ESC used. The measurement of the efficiency of very small propellers from DJI drones is affected by air...

I use a wind tunnel to determine the efficiency of the propellers. But propeller efficiency is mainly useful for propeller designers. For the average drone owner, efficiency may only be important when he or she starts wondering how to extend battery life, reduce drone noise, achieve some kind of...

Test conditions: ESC supply voltage 8.2 V, altitude 230 m, air temperature 23 °C and air pressure 1000.2 hPa. (Note: The measured propeller efficiency is always dependent on the efficiency of the motor and ESC used.) The graph shows that when the propeller reaches 8588 rpm, it has an efficiency...

I'm pleased to see your interest in efficiency. I hope to get a propeller from DJI mini 3 by the end of the month or so. Maybe someone from Germany will lend me a propeller, as there are a large number of DJI mini 3 owners there. I have now finished the propeller test from the DJI mavic mini. I...

Now I plan to measure the efficiency of the original propeller from DJI mavic mini and from DJI mini 2. I have these propellers at my disposal. Unfortunately, I don't have any other propellers available at the moment. If there is someone (preferably from the EU, so I don't have to pay VAT and...

The chart shows that when the propeller reaches 4874 rpm, it has an efficiency of almost 9% (8.6% to be exact). However, as the rpm increases further, the efficiency drops further. If one propeller reaches 4874 rpm, it produces a thrust of about 185 g and four propellers produce a total thrust...

Propeller aerodynamics - research, development, 3D CAD modelling, prototyping, balancing and parameter measurement (on profi equipment, with data/graphic logging of speed, power, thrust, efficiency, amperage, ...).

kV = 2917 (I will post the measured thrust and Ampere current in graphs in about 14 days, but in a new thread, which will be about propeller efficiency measurements /propellers from DJI mini 2 and DJI mavic mini/)